High efficiency, high output, floor standing loudspeaker. Features full-range high output Zu10HO-16 driver ZuRG driver/box/room acoustic loading technology, no cross over or filters on full range driver. complimented by a phenolic composite dome, time aligned machined from 6061 billet lensed tweeter. 101 dB efficiency makes these a great match for low powered sets or I have used them with larger more powerful tube amps. As I understand it the stone metal gray color is an upcharge from stock Superflys.
There is a small scrape mark on one of the bottom corners that I have tried to capture in the pics but it doesn't show up very well. Other than normal wear these are in great shape. Comes with plastic "frisbe" like covers for the speakers when not in use. See the Zu website for more info